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Date: Tue, 28 Dec 2021 23:09:51 +0100
From: Rafał Miłecki <zajec5@...il.com>
To: Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org,
bcm-kernel-feedback-list@...adcom.com,
Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH] net: dsa: bcm_sf2: refactor LED regs access
From: Rafał Miłecki <rafal@...ecki.pl>
1. Define more regs. Some switches (e.g. BCM4908) have up to 6 regs.
2. Add helper for handling non-lineral port <-> reg mappings.
3. Add support for 12 B LED reg blocks on BCM4908 (different layout)
Complete support for LEDs setup will be implemented once Linux receives
a proper design & implementation for "hardware" LEDs.
Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
drivers/net/dsa/bcm_sf2.c | 60 +++++++++++++++++++++++++++----
drivers/net/dsa/bcm_sf2.h | 10 ++++++
drivers/net/dsa/bcm_sf2_regs.h | 65 +++++++++++++++++++++++++++++++---
3 files changed, 125 insertions(+), 10 deletions(-)
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 13aa43b5cffd..c2447de9d441 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -62,6 +62,44 @@ static u16 bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv *priv, int port)
return REG_SWITCH_STATUS;
}
+static u16 bcm_sf2_reg_led_base(struct bcm_sf2_priv *priv, int port)
+{
+ switch (priv->type) {
+ case BCM4908_DEVICE_ID:
+ switch (port) {
+ case 0:
+ return REG_LED_0_CNTRL;
+ case 1:
+ return REG_LED_1_CNTRL;
+ case 2:
+ return REG_LED_2_CNTRL;
+ case 3:
+ return REG_LED_3_CNTRL;
+ case 7:
+ return REG_LED_4_CNTRL;
+ default:
+ break;
+ }
+ break;
+ default:
+ switch (port) {
+ case 0:
+ return REG_LED_0_CNTRL;
+ case 1:
+ return REG_LED_1_CNTRL;
+ case 2:
+ return REG_LED_2_CNTRL;
+ default:
+ break;
+ }
+ }
+
+ WARN_ONCE(1, "Unsupported port %d\n", port);
+
+ /* RO fallback reg */
+ return REG_SWITCH_STATUS;
+}
+
/* Return the number of active ports, not counting the IMP (CPU) port */
static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds)
{
@@ -187,9 +225,14 @@ static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
/* Use PHY-driven LED signaling */
if (!enable) {
- reg = reg_readl(priv, REG_LED_CNTRL(0));
- reg |= SPDLNK_SRC_SEL;
- reg_writel(priv, reg, REG_LED_CNTRL(0));
+ u16 led_ctrl = bcm_sf2_reg_led_base(priv, 0);
+
+ if (priv->type == BCM7278_DEVICE_ID ||
+ priv->type == BCM7445_DEVICE_ID) {
+ reg = reg_led_readl(priv, led_ctrl, 0);
+ reg |= LED_CNTRL_SPDLNK_SRC_SEL;
+ reg_led_writel(priv, reg, led_ctrl, 0);
+ }
}
}
@@ -1232,9 +1275,14 @@ static const u16 bcm_sf2_4908_reg_offsets[] = {
[REG_SPHY_CNTRL] = 0x24,
[REG_CROSSBAR] = 0xc8,
[REG_RGMII_11_CNTRL] = 0x014c,
- [REG_LED_0_CNTRL] = 0x40,
- [REG_LED_1_CNTRL] = 0x4c,
- [REG_LED_2_CNTRL] = 0x58,
+ [REG_LED_0_CNTRL] = 0x40,
+ [REG_LED_1_CNTRL] = 0x4c,
+ [REG_LED_2_CNTRL] = 0x58,
+ [REG_LED_3_CNTRL] = 0x64,
+ [REG_LED_4_CNTRL] = 0x88,
+ [REG_LED_5_CNTRL] = 0xa0,
+ [REG_LED_AGGREGATE_CTRL] = 0xb8,
+
};
static const struct bcm_sf2_of_data bcm_sf2_4908_data = {
diff --git a/drivers/net/dsa/bcm_sf2.h b/drivers/net/dsa/bcm_sf2.h
index 0d48402068d3..00afc94ce522 100644
--- a/drivers/net/dsa/bcm_sf2.h
+++ b/drivers/net/dsa/bcm_sf2.h
@@ -210,6 +210,16 @@ SF2_IO_MACRO(acb);
SWITCH_INTR_L2(0);
SWITCH_INTR_L2(1);
+static inline u32 reg_led_readl(struct bcm_sf2_priv *priv, u16 off, u16 reg)
+{
+ return readl_relaxed(priv->reg + priv->reg_offsets[off] + reg);
+}
+
+static inline void reg_led_writel(struct bcm_sf2_priv *priv, u32 val, u16 off, u16 reg)
+{
+ writel_relaxed(val, priv->reg + priv->reg_offsets[off] + reg);
+}
+
/* RXNFC */
int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
struct ethtool_rxnfc *nfc, u32 *rule_locs);
diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h
index 7bffc80f241f..da0dedbd6555 100644
--- a/drivers/net/dsa/bcm_sf2_regs.h
+++ b/drivers/net/dsa/bcm_sf2_regs.h
@@ -25,6 +25,10 @@ enum bcm_sf2_reg_offs {
REG_LED_0_CNTRL,
REG_LED_1_CNTRL,
REG_LED_2_CNTRL,
+ REG_LED_3_CNTRL,
+ REG_LED_4_CNTRL,
+ REG_LED_5_CNTRL,
+ REG_LED_AGGREGATE_CTRL,
REG_SWITCH_REG_MAX,
};
@@ -56,6 +60,63 @@ enum bcm_sf2_reg_offs {
#define CROSSBAR_BCM4908_EXT_GPHY4 1
#define CROSSBAR_BCM4908_EXT_RGMII 2
+/* Relative to REG_LED_*_CNTRL (BCM7278, BCM7445) */
+#define LED_CNTRL_NO_LINK_ENCODE_SHIFT 0
+#define LED_CNTRL_M10_ENCODE_SHIFT 2
+#define LED_CNTRL_M100_ENCODE_SHIFT 4
+#define LED_CNTRL_M1000_ENCODE_SHIFT 6
+#define LED_CNTRL_SEL_NO_LINK_ENCODE_SHIFT 8
+#define LED_CNTRL_SEL_10M_ENCODE_SHIFT 10
+#define LED_CNTRL_SEL_100M_ENCODE_SHIFT 12
+#define LED_CNTRL_SEL_1000M_ENCODE_SHIFT 14
+#define LED_CNTRL_RX_DV_EN (1 << 16)
+#define LED_CNTRL_TX_EN_EN (1 << 17)
+#define LED_CNTRL_SPDLNK_LED0_ACT_SEL_SHIFT 18
+#define LED_CNTRL_SPDLNK_LED1_ACT_SEL_SHIFT 20
+#define LED_CNTRL_ACT_LED_ACT_SEL_SHIFT 22
+#define LED_CNTRL_SPDLNK_SRC_SEL (1 << 24)
+#define LED_CNTRL_SPDLNK_LED0_ACT_POL_SEL (1 << 25)
+#define LED_CNTRL_SPDLNK_LED1_ACT_POL_SEL (1 << 26)
+#define LED_CNTRL_ACT_LED_POL_SEL (1 << 27)
+#define LED_CNTRL_MASK 0x3
+
+/* Register relative to REG_LED_*_CNTRL (BCM4908) */
+#define REG_LED_CTRL 0x0
+#define LED_CTRL_RX_ACT_EN 0x00000001
+#define LED_CTRL_TX_ACT_EN 0x00000002
+#define LED_CTRL_SPDLNK_LED0_ACT_SEL 0x00000004
+#define LED_CTRL_SPDLNK_LED1_ACT_SEL 0x00000008
+#define LED_CTRL_SPDLNK_LED2_ACT_SEL 0x00000010
+#define LED_CTRL_ACT_LED_ACT_SEL 0x00000020
+#define LED_CTRL_SPDLNK_LED0_ACT_POL_SEL 0x00000040
+#define LED_CTRL_SPDLNK_LED1_ACT_POL_SEL 0x00000080
+#define LED_CTRL_SPDLNK_LED2_ACT_POL_SEL 0x00000100
+#define LED_CTRL_ACT_LED_POL_SEL 0x00000200
+#define LED_CTRL_LED_SPD_OVRD 0x00001c00
+#define LED_CTRL_LNK_STATUS_OVRD 0x00002000
+#define LED_CTRL_SPD_OVRD_EN 0x00004000
+#define LED_CTRL_LNK_OVRD_EN 0x00008000
+
+/* Register relative to REG_LED_*_CNTRL (BCM4908) */
+#define REG_LED_LINK_SPEED_ENC_SEL 0x4
+#define LED_LINK_SPEED_ENC_SEL_NO_LINK_SHIFT 0
+#define LED_LINK_SPEED_ENC_SEL_10M_SHIFT 3
+#define LED_LINK_SPEED_ENC_SEL_100M_SHIFT 6
+#define LED_LINK_SPEED_ENC_SEL_1000M_SHIFT 9
+#define LED_LINK_SPEED_ENC_SEL_2500M_SHIFT 12
+#define LED_LINK_SPEED_ENC_SEL_10G_SHIFT 15
+#define LED_LINK_SPEED_ENC_SEL_MASK 0x7
+
+/* Register relative to REG_LED_*_CNTRL (BCM4908) */
+#define REG_LED_LINK_SPEED_ENC 0x8
+#define LED_LINK_SPEED_ENC_NO_LINK_SHIFT 0
+#define LED_LINK_SPEED_ENC_M10_SHIFT 3
+#define LED_LINK_SPEED_ENC_M100_SHIFT 6
+#define LED_LINK_SPEED_ENC_M1000_SHIFT 9
+#define LED_LINK_SPEED_ENC_M2500_SHIFT 12
+#define LED_LINK_SPEED_ENC_M10G_SHIFT 15
+#define LED_LINK_SPEED_ENC_MASK 0x7
+
/* Relative to REG_RGMII_CNTRL */
#define RGMII_MODE_EN (1 << 0)
#define ID_MODE_DIS (1 << 1)
@@ -73,10 +134,6 @@ enum bcm_sf2_reg_offs {
#define LPI_COUNT_SHIFT 9
#define LPI_COUNT_MASK 0x3F
-#define REG_LED_CNTRL(x) (REG_LED_0_CNTRL + (x))
-
-#define SPDLNK_SRC_SEL (1 << 24)
-
/* Register set relative to 'INTRL2_0' and 'INTRL2_1' */
#define INTRL2_CPU_STATUS 0x00
#define INTRL2_CPU_SET 0x04
--
2.31.1
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